连续识别Zn2+和草甘膦荧光探针的合成与应用
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1.哈尔滨理工大学 材料科学与化学工程学院 绿色化工技术黑龙江省高校重点实验室

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TQ422

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国家自然科学基金(21908034);黑龙江省自然科学基金(LH2021H001)


Synthesis and application of novel fluorescent probe for the sequential recognition of Zn2+ and glyphosate
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1.Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province,School of Materials Science and Chemical Engineering,Harbin University of Science and Technology

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    摘要:

    以2-巯基苯并噻唑为原料,设计合成了一种结构简单的苯并噻唑类荧光探针NSS,并通过IR、HRMS、1HNMR、13CNMR等对其结构进行表征。荧光发射光谱表明,在DMSO溶液中,探针NSS实现了Zn2+的“Turn-ON”型检测,具有响应时间短、特异性强、抗干扰性强等优点。探针NSS荧光强度与Zn2+浓度(0~11 μmol/L)呈现良好的线性关系,检出限达19.1 nmol/L,并与Zn2+形成1:1络合物。同时,络合物NSS-Zn2+对草甘膦呈现特异性的荧光猝灭响应,猝灭率达99.4%,检出限16.0 nmol/L(2.68 ng/mL),且不受其它有机磷农药的干扰。此外,探针NSS成功应用于实际水样中Zn2+和草甘膦的检测,具有良好的应用前景。

    Abstract:

    A fluorescent probe NSS of benzothiazole derivatives was synthesized using 2-mercaptobenzothiazole as raw material and the structure was characterized by IR, MS, 1H NMR, 13C NMR. The fluorescence spectroscopy studies demonstrated that the probe NSS showed fast-response, high selectivity and good anti-interference ability towards Zn2+ ion through the significant fluorescence enhancement effect in the DMSO solution. The fluorescence intensity of probe NSS had a good linear relationship with the concentration of Zn2+ (0~11 μmol/L), and the detection limit could reach 19.1 nmol/L. The bingding stoichiometry of probe NSS with Zn2+ was 1:1, which was confirmed by Job's plot analysis and MS. Meanwhile, complex NSS-Zn2+ had obviously fluorescence intensity quenched response to glyphosate while suffering from a slight interference in the presence of other organophosphorus pesticides. The quenching efficiency reached a maximum of 99.4%, and the detection limit of complex NSS-Zn2+ to glyphosate was 16.0 nmol/L (2.68 ng/mL). In addition, probe NSS was succesfully used in the detection of Zn2+ and glyphosate in the actual water samples, the method had potential application in the field of environmental detection.

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喻艳超,陈心仪,巴新宇,李艳萍,刘洋,曾运波.连续识别Zn2+和草甘膦荧光探针的合成与应用[J].精细化工,2022,39(12):

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  • 收稿日期:2022-05-04
  • 最后修改日期:2022-07-20
  • 录用日期:2022-07-22
  • 在线发布日期: 2022-10-25
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